[2] Internationally Djonkep first played for Cameroon U20 at the 1981 FIFA World Youth Championship, appearing in all three of their group matches and scoring two goals against Australia U20.

[3] As a full international he appeared in two qualifying matches for the 1986 FIFA World Cup against Zambia in April 1985.

He was called up by coach Valeri Nepomniachi to the Cameroon squad which participated the 1990 FIFA World Cup.

Djonkep was unused in the group stage but did appear in their round of 16 match against Colombia, coming on in the 69th minute as a substitute for Cyrille Makanaky.

[4] Cameroon won in extra time through two goals by Roger Milla and were knocked out in the quarter-finals by England.